This is a clean effect with wonderful props. Five cards are shown four blank and a spot card. Also a piece of wood with 5 tacks embeded in it. You also show a cover with a large piece of wood going through it.
The piece of wood is shown to be clearly empty as is the cover. The wood with the tacks is held by a spectator under a hanky … then it happens. The card dissappears, a tack breaks off from the ones embedded in the wood, only to appear inside the cover.